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Finding the Fourth Proportional to 60,310.70, 90,474.96 and 20,857.22

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Solution

The fourth proportional to 60,310.70, 90,474.96 and 20,857.22 is: 31,288.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,310.70 : 90,474.96 = 20,857.22 : x
  2. Step 2: Convert to fraction form
    60,310.70/90,474.96 = 20,857.22/x
  3. Step 3: Cross multiply
    60,310.70x = 90,474.96 × 20,857.22
  4. Step 4: Simplify right side
    60,310.70x = 1,887,056,145.21
  5. Step 5: Solve for x
    x = 1,887,056,145.21/60,310.70
  6. Step 6: Final answer
    x = 31,288.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.